Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
MILLETT MARK D
  2. Issuer Name and Ticker or Trading Symbol
STEEL DYNAMICS INC [STLD]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President and CEO
(Last)
(First)
(Middle)
7575 W. JEFFERSON BLVD.
3. Date of Earliest Transaction (Month/Day/Year)
11/11/2013
(Street)

FORT WAYNE, IN 46804
4. If Amendment, Date Original Filed(Month/Day/Year)
11/13/2013
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 11/11/2013   M(1)   15,297 A $ 5.23 2,890,109 (4) D  
Common Stock 11/11/2013   F(3)   4,151 D $ 19.27 2,885,958 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $ 5.23 11/11/2013   M(2)     15,297 05/21/2009 11/21/2013 Common Stock 15,297 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MILLETT MARK D
7575 W. JEFFERSON BLVD.
FORT WAYNE, IN 46804
  X     President and CEO  

Signatures

 Mark D. Millett   11/13/2013
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) AMENDED FOOTNOTES: Acquisition of stock pursuant to exercise of employee stock option, exempt under Exchange Act Rule 16b-6(b) and Rule 16b-3(d)(1).
(2) Exercise of stock option, exempt under Exchange Act Rule 16b-6(b).
(3) Disposition to Issuer: Shares withheld by Issuer in payment of reporting person's exercise price under stock option granted in accordance with Exchange Act Rule 16b-3(d)(1), approved in advance by Compensation Committee and exempt from Section 16(b) of Exchange Act in accordance with Exchange Act Rule 16b-3(e).
(4) Total reflects the addition of 1,623 shares to correct calculation error.

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